Translation guide
The English word "outdated" refers to something that is no longer current, useful, or in style. In Japanese, the most natural translation depends on whether you are talking about technology, fashion, information, or systems. The most common and versatile word is 時代遅れ (jidai okure), but other options like 古い (furui) or 旧式 (kyūshiki) are used in specific contexts.
Describing something that is behind the times, old-fashioned, or not modern.
The most direct and common translation for "outdated." It can be used for technology, ideas, fashion, etc. It is a noun or na-adjective.
This computer is outdated.
His way of thinking is outdated.
Means "old." Often used for things that are simply not new, but can imply outdatedness in context. More casual than 時代遅れ.
That software is already outdated.
Means "old-style" or "old model." Often used for machines, systems, or methods that are outdated compared to newer versions.
The machinery in this factory is outdated.
Means "fallen into disuse" or "obsolete." Often used for customs, fashions, or words that are no longer used. Has a nuance of having gone out of style.
That word is outdated now.
Specifically for technology, software, or hardware that is no longer up-to-date.
Works perfectly for tech as well.
This app is outdated and no longer supported.
Common for hardware or systems that are an older model.
Literally "the version is old." Very common for software.
Your browser is outdated.
For facts, statistics, or news that are no longer current.
For clothing, trends, or styles that are no longer in fashion.
Do not try to translate "outdated" as 外に出た日付 or similar literal phrases. These are not natural Japanese.
時代遅れ explicitly means "behind the times" and carries a stronger judgment. 古い simply means "old" and can be neutral. Use 古い for factual statements (e.g., old data) and 時代遅れ when criticizing something as not modern.
This textbook is outdated.
My phone is getting outdated.
旧式のパソコンでは最新のOSは動かない。
The latest OS won't run on an outdated PC.
そのジャケット、ダサくない？
Isn't that jacket outdated?
Literally "behind the trend." More specific to fashion and trends.
That design is already outdated.